还要问两个函数的作用，只是播放列表类载主类里的两个函数

Question

bool CTigerPlayerDlg::Nosamefilename(CString m_filename)
{
int items=m_musiclist.m_Musiclist.GetItemCount(); 
for(int index=0;index <items;index++) 
{
if( m_musiclist.m_Musiclist.GetItemText(index,0) == m_filename)
return false;
}
return true;}
void CTigerPlayerDlg::Selist_Play(WPARAM wParam, LPARAM lParam)
{

CString m_filepath;
m_filepath =*((CString *) wParam);
m_filepath.MakeUpper();
    m_TigerPlayer.SetFileName(m_filepath);
m_TigerPlayer.GetAutoStart();
m_TigerPlayer.SetAutoStart(true);
CString text2=m_TigerPlayer.GetFileName();
m_TigerPlayer.SetWindowText(text2); 
m_TigerPlayer.SetShowControls(false);

//获取文件名
//CWnd::SetDlgItemText(IDC_medianame,m_filepath);
m_playname = m_filepath;
UpdateData(false); OnPlay(); }
这是初始化里的定义函数
   m_TigerPlayer.SetFileName(PathName); //m_musiclist
   
    CWnd::SetDlgItemText(IDC_medianame,filename);
   
//long movsize;
//movsize=m_TigerPlayer.GetMovieWindowSize() ;
//   if(movsize<0.1)   
    //{   
       
// m_TigerPlayer.Pause();
   //m_TigerPlayer.SetMovieWindowSize(1);
 
   //m_TigerPlayer.Run();
       // rc1.bottom=rc1.top+225;   
    //}       m_Bit.ShowWindow(SW_HIDE);

m_TigerPlayer.GetAutoStart();
m_TigerPlayer.SetAutoStart(true);
CString text2=m_TigerPlayer.GetFileName();
m_TigerPlayer.SetWindowText(text2); 
m_TigerPlayer.SetShowControls(false);
filename=dlg.GetFileName();
//将文件名添加播放列表中  在此之前必须按先进行无重复查找
if(Nosamefilename(filename)){
m_musiclist.m_Musiclist.InsertItem(0,filename);
music_filepath[music_num] = PathName;

m_musiclist.m_Musiclist.SetItemData(0,(DWORD)&music_filepath[music_num]);//将文件地址指针保存在隐藏域
//CString  dd;
//dd.Format("%d",music_num);
//AfxMessageBox(dd);
music_num++;
}
// m_TigerPlayer.SetEnableContextMenu(false);
SetTimer(1,10,NULL); //MoveMovieWindow();
//bool Pos=true;
//m_TigerPlayer.GetShowPositionControls()=true;
//m_TigerPlayer.SetShowPositionControls(Pos);
// m_TigerPlayer.SetAppearance(m_TigerPlayer.GetAppearance());
// m_TigerPlayer.SetDisplayMode(m_TigerPlayer.GetDisplayMode());
// m_TigerPlayer.SetMovieWindowSize(m_TigerPlayer.GetMovieWindowSize());
   // TODO: Add your control notification handler code here